<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
               v-for="city in hotCities"
               :key="city.id"
               @click="handleCityClick(city.name)">
            <div class="button">{{city.name}}</div>
          </div>

        </div>
      </div>
      <div class="area"
           v-for="(val ,key) in cities"
           :key="key"
           :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
               v-for="item in val"
               :key="item.id"
               @click="handleCityClick(item.name)">{{item.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  import Bscroll from 'better-scroll'

  import {mapState, mapMutations} from 'vuex'

  export default {
    name: 'List',
    props: {
      hotCities: Array,
      cities: Object,
      letter: String
    },
    computed: {
      ...mapState(['city'])
    },
    mounted () {
      this.scroll = new Bscroll(this.$refs.wrapper)
    },
    watch:{
      letter(){
        // console.log(this.letter)
        if(this.letter){
          const element = this.$refs[this.letter][0]
          // console.log(element)
          this.scroll.scrollToElement(element)
        }
      }
    },
    methods: {
      ...mapMutations(['changCity']),
      handleCityClick(city){
        // alert(city)
        this.changCity(city)
        this.$router.push('/')
      }
    }
  }
</script>

<style scoped lang="stylus">

  .border-topbottom::before,
  .border-topbottom::after,
  .border-bottom::before {
    border-color #777
  }
  .title{
    line-height .54rem
    background #eee
    padding-left .2rem
    color: #555
    font-size .26rem
  }
  .button-list{
    overflow hidden
    padding .1rem .6rem .1rem .1rem
  }
  .button-wrapper{
    width 33.33%
    float left
  }
  .button{
    text-align center
    margin .1rem
    border .02rem solid #ccc
    padding .1rem 0
    border-radius .06rem
  }
  .item{
    line-height .76rem
    padding-left .2rem

  }
  .list{
    overflow hidden
    position absolute
    top:1.58rem
    left 0
    right 0
    bottom 0
  }
</style>
